GB1420282A - Process and apparatus for electrical discharge shaping - Google Patents
Process and apparatus for electrical discharge shapingInfo
- Publication number
- GB1420282A GB1420282A GB2336473A GB2336473A GB1420282A GB 1420282 A GB1420282 A GB 1420282A GB 2336473 A GB2336473 A GB 2336473A GB 2336473 A GB2336473 A GB 2336473A GB 1420282 A GB1420282 A GB 1420282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gap
- discharge
- pulse
- electrical discharge
- steps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
1420282 Automatic control of discharge machining MITSUBISHI DENKI K K 16 May 1973 [24 May 1972] 23364/73 Heading G3R In electrical discharge machining apparatus, pulses are applied between a workpiece and an electrode, each pulse comprising a plurality of different voltage levels. The width of the gap is adjusted according to the voltage level at which discharge is initiated. As shown, four steps are applied in each pulse with V 1 <V 2 <V 3 , and V 4 may be zero. If discharge occurs in time interval T i the gap is increased, if in T 2 the gap is unchanged and if in T 3 the gap is reduced. Thus the gap is adjusted until discharge occurs in interval T 2 . V 1 , V 2 (which may be variable) and V 3 may be separate D.C. sources successively connected across the gap using switching transistors 2a to 2c, Fig. 8, controlled by a logic circuit Fig. 9 (not shown). The voltage step V 2 may be replaced by a plurality of steps each maintained for predetermined intervals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5144772A JPS5622650B2 (en) | 1972-05-24 | 1972-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1420282A true GB1420282A (en) | 1976-01-07 |
Family
ID=12887173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2336473A Expired GB1420282A (en) | 1972-05-24 | 1973-05-16 | Process and apparatus for electrical discharge shaping |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5622650B2 (en) |
| BE (1) | BE799819A (en) |
| CH (1) | CH561578A5 (en) |
| DE (1) | DE2326007C3 (en) |
| FR (1) | FR2185473B1 (en) |
| GB (1) | GB1420282A (en) |
| IT (1) | IT987968B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56126537A (en) * | 1980-03-05 | 1981-10-03 | Hitachi Seiko Ltd | Gap control method for spark machining device |
| CH638125A5 (en) * | 1980-07-30 | 1983-09-15 | Charmilles Sa Ateliers | METHOD AND DEVICE FOR SPARKING MACHINING. |
| FR2507516A1 (en) * | 1981-06-16 | 1982-12-17 | Fiz Tekhn I Ak | METHOD FOR ELECTROEROSION MACHINING OF ELECTRICALLY CONDUCTIVE MATERIALS AND DEVICE FOR IMPLEMENTING SAME |
| JPS58211826A (en) * | 1982-05-28 | 1983-12-09 | Mitsubishi Electric Corp | Electric discharge machining device |
| JPS6347019A (en) * | 1986-08-18 | 1988-02-27 | Mitsubishi Electric Corp | Electric-discharge machine |
| JPH07108487B2 (en) * | 1986-11-05 | 1995-11-22 | 三菱電機株式会社 | Wire cut electrical discharge machine |
| JPH0649253B2 (en) * | 1988-07-27 | 1994-06-29 | 三菱電機株式会社 | Device for controlling the distance between electrodes in an electric discharge machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2979639A (en) * | 1958-06-09 | 1961-04-11 | Firth Sterling Inc | Pilot pulse spark machining methods and apparatus |
| BE755328A (en) * | 1969-08-26 | 1971-02-01 | Agie Ag Ind Elektronik | APPARATUS INCLUDING AT LEAST TWO PULSE GENERATORS WITHOUT ACCUMULATING ORGAN FOR ELECTRO-EROSION MACHINING |
| JPS5112880B1 (en) * | 1970-06-02 | 1976-04-22 | ||
| JPS575083B2 (en) * | 1974-08-28 | 1982-01-28 |
-
1972
- 1972-05-24 JP JP5144772A patent/JPS5622650B2/ja not_active Expired
-
1973
- 1973-05-16 GB GB2336473A patent/GB1420282A/en not_active Expired
- 1973-05-21 BE BE131346A patent/BE799819A/en not_active IP Right Cessation
- 1973-05-22 DE DE19732326007 patent/DE2326007C3/en not_active Expired
- 1973-05-23 CH CH739673A patent/CH561578A5/xx not_active IP Right Cessation
- 1973-05-24 IT IT2452073A patent/IT987968B/en active
- 1973-05-24 FR FR7318973A patent/FR2185473B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2185473B1 (en) | 1977-02-11 |
| IT987968B (en) | 1975-03-20 |
| DE2326007B2 (en) | 1980-09-11 |
| FR2185473A1 (en) | 1974-01-04 |
| JPS498897A (en) | 1974-01-25 |
| JPS5622650B2 (en) | 1981-05-26 |
| CH561578A5 (en) | 1975-05-15 |
| DE2326007C3 (en) | 1981-07-30 |
| BE799819A (en) | 1973-11-21 |
| DE2326007A1 (en) | 1973-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920516 |